Improvement in gear-shaft boxes for driving mill-rolls



W. GARRETT,

Gear-Shaft Boxes for Driving Mill-Rolls. N0.l54,386. Patented Aug-25,1874

Inga.

UNITED STATES PATENT OFFICE.

WILLIAM GARRETT, CLEVELAND, OHIO.

IMPROVEMENT IN GEAR-SHAFT BOXES FOR DRIVING MILL-ROLLS.

Specification forming part of Letters Patent No. 154,386, dated August 25,1874; application filed June 30, 1874.

To all whom it may concern Be it known that I, WILLIAM GARRETT, of Cleveland, in the county of Ouyahoga and State of Ohio, have invented a certain new and Improved Gear- Shaft Box for Driving Mill-Rolls; and I do hereby declare that the following is afull, clear, and complete description thereof, reference being had to the accompanying drawings making part of the same.

Figure 1 is a front elevation of the housing, having therein the journal-box. Fig. 2 is an end view. Fig. 3 is a plan view.

Like letters of reference refer to like parts in the several views.

The nature of this invention relates to the journal-boxes of the rolls for rolling iron; and the object thereof is to so construct and arrange said boxes that the wearing-surface shall be mainly opposed to the line of the strain exerted upon the rollers, whereby the boxes are caused to wear longer and more evenly than the ordinary boxes. The invention also has for its object the adjustment of the boxes in their relation to the journal by means of adjusting-screws, so that the boxes can be kept close fitting to the journals.

The boxes ordinarily used for the journals of iron rolls are two -partboxes, one part whereof is arranged immediately above the journal, and the other part below it, so that the space between the two sections of the box is directly across the housings, and at right angles' therewith. This position of the sections of the boxes is the most favorable one when the line of strain is vertical, as the full bearingsurface of the sections is then opposed to the face of the journal in direction of such strain; hence the boxes will wear more evenly in their circumferential surfaces, whereas, if the strain is diverted from a vertical line to an oblique one, the boxes will wear unevenly-that is to say, one side of a section of the box would wear rapidly, whereas the other side would wear but little.

Now, it is well known to those engaged in this branch of the arts that the strain exerted on the rolls, caused by the passes of the iron through them, is not in a vertical line, but in an oblique one, as indicated by the lines a, Fig. 2. The consequence is, that the journalboxes, which are set square in the housings, as above said, wear away in an oblique direction, or in line of the greatest strain or pressure; hence a large portion of the journal-box wears but little, whereas the other portion near the opposite edge wears rapidly, thereby making the boxes uneven, and untrue in their relation to the journals.

To avoid this objectionable feature of the mill-roll, I arrange the sections of the boxes diagonally in the housing, as shown in Fig.' 2, in which A is the housing; B, the shafts of the rolls, and O G the two sections of the journal-boxes. In this arrangement of the boxes their full circumferential faces are in contact with the face of the journal, and opposed to the oblique strain upon the rolls; hence the entire surface of the box will wear alike and evenly, and continue to be in full wearing contact with the journals.

From time to time, as the journal may become loose, the boxes can be set closer thereto transversely by the adj usting-screws D D, and vertically. by the adjusting-screws E E.

What I claim as my invention, and desire to secure by Letters Patent, is-

The combination of the adjustable obliquelyarranged boxes 0 O, housings A, journal B, and adjusting-screws D, in the manner as described, and for the purpose set forth.

WILLIAM GARRETT.

Witnesses:

J. H. BURRIDGE, A. 1 CORNELL. 

